关键词: 生鲜品, 二级供应链, 保鲜努力

Abstract: In combination with the background of severe fresh loss and excessive preservation, on the basis of distinction between quality guarantee period and actual effective delivery time length, a comparative study of two level fresh supply chain consisting of a single retailer and a single supplier ismade.Whether the two main subjects cooperate and the dominant subject changes or not has an important impact on the supply chain’s freshness, effort level and pricing. The research shows that, in the centralized supply chain, fresh effort increases with the freshness sensitivity, the fresh keeping effort increases with the effective delivery time length and is inverted ‘U’ type. The total profit of supply chain increases with the freshness and actual effective delivery time length. In the distributed supply chain, with the increase of sensitivity to freshness, the preservation efforts and overall profits increase. As the effective delivery time length increases, the preservation effort increases first and then decreases, and the total profit increases. There is a chance of free riding in decentralized supply chain, but since the effective delivery time length is different from the quality guarantee period, with the scale between the two time length changes, it may be more beneficial to conduct self preservation efforts than to take a free ride.

Key words: fresh products, two echelon fresh supply chain, freshness-keeping efforts